Cap for a gas burner



FIG. 1 is a perspective view of a cap for a gas burner showing my new design, the gas burner is shown in broken lines for illustrative purposes only and forms no part of the claimed design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a side elevational view thereof; and

FIG. 5 is a sectional view taken along lines 5--5 in FIG. 4. 

The ornamental design for a cap for a gas burner, as shown and described. 